January in Skien averages a daily high of 0.3°C with nights around -5.5°C. Expect roughly 13.8 wet days totalling 52.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Skien is June–September.
Based on GVARV NES, NO (30.1km), 1995–2024. 27 years of January data.